This patch adds to radeon the enablement of sdma preemption.
This is needed to support HWS of SDMA user-mode queues.
Signed-off-by: NBen Goz <ben.goz@amd.com>
Signed-off-by: NOded Gabbay <oded.gabbay@amd.com>
Reviewed-by: NAlex Deucher <alexander.deucher@amd.com>